O Levels Biology (5090)•5090/12/O/N/20

Explanation
Malaria Control Strategies
Steps:
- Identify vector control: Statement 1 uses insecticides to eliminate mosquitoes, reducing transmission.
- Identify physical barriers: Statement 2 employs netting to prevent mosquito bites on humans.
- Identify chemoprevention: Statement 3 involves drugs that inhibit Plasmodium development in people.
- Confirm all methods: Each targets different aspects of malaria lifecycle per WHO guidelines.
Why A is correct:
- All three statements align with integrated malaria control, combining vector reduction, bite prevention, and pathogen suppression as defined by global health protocols.
Why the others are wrong:
- B omits drug-based prevention, a core human-side strategy.
- C ignores netting and drugs, limiting to partial vector control.
- D excludes insecticides, neglecting essential mosquito elimination.
Final answer: A
Topic: Disease
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